# libSceNpCommon technical debt

### Unknown function info

The 34 declarations below use names mapped from the local `libSceNpCommon.sprx` export table. Each NID was verified against that table and recomputed from its name with `tools/nid_names.py`. The public [PS5 3.20 libSceNpCommon export list](https://github.com/DNNDHH/PS5-3.20_Libs/blob/main/libSceNpCommon.c) contains all 150 symbol names. No prototype or behavior is claimed. Each declaration uses the no-parameter unknown-signature convention solely for import resolution and throws if called.

- [sceNpCloseSema](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `8hPzfjZzV88`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpGetNavSdkVersion](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `QmDEFikd3VA`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpIntGetPlatformType](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `G6qytFoBJ-w`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpIntSetPlatformType](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `X6emt+LbSEI`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpJsonParse](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `vJGDnNh4I0g`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpJsonParseBuf](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `RgfCYkjW7As`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpJsonParseBufInit](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `SnAdybtBK3o`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpJsonParseEx](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `p5ZkSMRR7AU`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpJsonParseExInit](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `nhgjiwPUIzI`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpJsonParseInit](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `teVnFAL6GNY`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpOpenSema](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `-blITIdtUd0`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpServerErrorJsonGetErrorCode](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `0lZHbA-HRD0`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpServerErrorJsonMultiGetErrorCode](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `cRabutqUG7c`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpServerErrorJsonParse](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `WSQxnAVLKgw`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpServerErrorJsonParseInit](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `UbStlMKTBeU`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpServerErrorJsonParseMultiInit](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `hbe+DdooIi4`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpSetPlatformType](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `m9JzZSoDVFY`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpUtilCanonicalizeNpIdForPs4](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `4mEAk-UKVNw`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpUtilCanonicalizeNpIdForPsp2](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `N3FB4r8JoRE`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpUtilGetDateSetAuto](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `owm52JoZ8uc`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpUtilGetDbgCommerce](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `1Gfhi+tZ9IE`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpUtilGetEnv](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `kBON3bAtfGs`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpUtilGetFakeDisplayNameMode](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `MUj0IV6XFGs`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpUtilGetFakeRateLimit](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `O86rgZ2azfg`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpUtilGetIgnoreNpTitleId](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `FrxliFYAO8Y`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpUtilGetNpDebug](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `GRvK1ZE+FEQ`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpUtilGetNpTestPatch](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `OA8f3KF9JsM`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpUtilGetShareTitleCheck](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `fB5hE65pzbU`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpUtilGetSystemLanguage](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `SXUNKr9Zkv0`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpUtilGetTrcNotify](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `AjzLvR0g5Zs`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpUtilGetWebApi2FakeRateLimit](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `pmHBFJyju9E`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpUtilGetWebApi2FakeRateLimitTarget](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `ZRxKp9vjcNc`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpUtilGetWebTraceSetting](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `4CqfNm3pisU`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.
- [sceNpUtilJidToNpId](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) (NID `458yjI+OECI`) - the signature and behavior are unknown. The no-parameter declaration only resolves the import; it makes no ABI claim. Calls throw through `NotImplemented_nid_no_patch`.

### Functional

- [Online ID and NpId utilities](../../../core/libs/prx/libSceNpCommon/Export.cpp) (libSceNpCommon) - `sceNpCmpOnlineId`, `sceNpCmpNpIdInOrder`, `sceNpGetPlatformType` and `sceNpIntIsValidOnlineId` are not measured on a console; their signatures, checks and results follow [shadPS4](https://github.com/shadps4-emu/shadPS4/blob/a808e76/src/core/libraries/np/np_common.cpp), including the platform tags read from `opt[4..7]` and the 3 to 16 character online ID rule.
- [Mutex, condition and thread wrappers](../../../core/libs/prx/libSceNpCommon/Export.cpp) (libSceNpCommon) - the `sceNpMutex*`, `sceNpLwMutex*`, `sceNpCond*` and `sceNpJoinThread` wrappers forward to the libkernel `scePthread*` calls as in [shadPS4](https://github.com/shadps4-emu/shadPS4/blob/a808e76/src/core/libraries/np/np_common.cpp) and are not measured on a console. Only `EBUSY` from try-lock and `ETIMEDOUT` from a timed wait are mapped to NP errors; every other kernel error is returned unchanged. The `flags` argument of `sceNpCondInit` is ignored.
- [sceNpGetSdkVersion](../../../core/libs/prx/libSceNpCommon/Export.cpp) (libSceNpCommon) - writes the libkernel system software version as `major.minor` into an 8-byte buffer without checking it, as shadPS4 does; that version is the fixed `1.00`, not the SDK version a title was built with.
- [The exports in Runtime.cpp](../../../core/libs/prx/libSceNpCommon/Runtime.cpp) and [Strings.cpp](../../../core/libs/prx/libSceNpCommon/Strings.cpp) follow `libSceNpCommon.sprx` from firmware 13.60, read from disassembly and not measured on a console.
- [sceNpCreateThread](../../../core/libs/prx/libSceNpCommon/Runtime.cpp) always applies an explicit priority when one is given; the firmware picks between explicit and inherited scheduling from the title's compiled SDK version, which is not available here.
- [sceNpCalloutStartOnCtx and sceNpCalloutStartOnCtx64](../../../core/libs/prx/libSceNpCommon/Runtime.cpp) look for the callout in the queue before writing it and return `0x80558006` with the entry and the queue unchanged. Firmware 13.60, read from disassembly and not measured on a console, clears and fills the entry before it takes the lock and checks the queue, so restarting a queued callout returns the same error but drops every callout queued after it.
- [sceNpArchInit and sceNpArchTerm](../../../core/libs/prx/libSceNpCommon/Runtime.cpp) keep a reference count under a lock and create the global heap once. Firmware 13.60, read from disassembly and not measured on a console, uses no lock and never sets its count on the first call, so every call made while the count is zero creates the heap again, and a call to sceNpArchTerm at zero destroys the heap and leaves the count negative.
- [sceNpGetRandom](../../../core/libs/prx/libSceNpCommon/Runtime.cpp) draws from a 32-bit Mersenne Twister seeded once per process; the console uses SFMT-19937 with a seed set inside the module, so the sequences differ.
- [sceNpHeapShowStat](../../../core/libs/prx/libSceNpCommon/Runtime.cpp) and [sceNpDbgDumpBinary](../../../core/libs/prx/libSceNpCommon/Runtime.cpp) print the same information as the console in a different layout.
- [The string-to-integer exports](../../../core/libs/prx/libSceNpCommon/Strings.cpp) clear `errno` before parsing; the firmware reads whatever `errno` held before the call when the result saturates.
- [The integer-to-string exports](../../../core/libs/prx/libSceNpCommon/Strings.cpp) return `0x80558008` when the hexadecimal prefix does not fit; the firmware writes the prefix without checking the size. [The base64 decoders](../../../core/libs/prx/libSceNpCommon/Strings.cpp) treat bytes above 0x7F as invalid; the firmware indexes its table with them as signed values. [sceNpUtilJsonGetOneChar](../../../core/libs/prx/libSceNpCommon/Strings.cpp) checks that a `\u` escape and a surrogate pair fit in the input; the firmware reads past it.
- [sceNpUtilGetNpDebug, sceNpUtilGetNpTestPatch, sceNpUtilGetTrcNotify, sceNpUtilGetIgnoreNpTitleId, sceNpUtilGetFakeDisplayNameMode, sceNpUtilGetWebTraceSetting, sceNpUtilGetWebApi2FakeRateLimit, sceNpUtilGetWebApi2FakeRateLimitTarget, sceNpUtilGetFakeRateLimit, sceNpUtilGetDbgCommerce, sceNpUtilGetSystemLanguage, sceNpUtilGetEnv, sceNpUtilGetDateSetAuto and sceNpUtilGetShareTitleCheck](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) read system and debug registry keys through libSceRegMgr, whose `sceRegMgrNonSysGetInt` and string reads still throw; they throw until those exist.
- [sceNpOpenSema and sceNpCloseSema](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) forward to the libkernel open and close calls for named semaphores, which still throw.
- [sceNpSetPlatformType, sceNpIntGetPlatformType, sceNpIntSetPlatformType, sceNpUtilCanonicalizeNpIdForPs4, sceNpUtilCanonicalizeNpIdForPsp2, sceNpUtilJidToNpId and sceNpGetNavSdkVersion](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) depend on console platform tags, network domain names or a version string of the console; they throw.
- [sceNpJsonParse, sceNpJsonParseInit, sceNpJsonParseBuf, sceNpJsonParseBufInit, sceNpJsonParseEx, sceNpJsonParseExInit and the sceNpServerErrorJson exports](../../../core/libs/prx/libSceNpCommon/PendingExports.cpp) are a streaming, schema-checked JSON parser whose event and error rules are not yet specified; they throw.